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Diffstat (limited to 'src/mainboard/google/enguarde/w25q64.c')
-rw-r--r--src/mainboard/google/enguarde/w25q64.c70
1 files changed, 70 insertions, 0 deletions
diff --git a/src/mainboard/google/enguarde/w25q64.c b/src/mainboard/google/enguarde/w25q64.c
new file mode 100644
index 0000000000..a9ed8ac98b
--- /dev/null
+++ b/src/mainboard/google/enguarde/w25q64.c
@@ -0,0 +1,70 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright (C) 2014 Google Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <string.h>
+#include <soc/spi.h>
+
+/*
+ * SPI lockdown configuration W25Q64FW.
+ */
+#define SPI_OPMENU_0 0x01 /* WRSR: Write Status Register */
+#define SPI_OPTYPE_0 0x01 /* Write, no address */
+
+#define SPI_OPMENU_1 0x02 /* BYPR: Byte Program */
+#define SPI_OPTYPE_1 0x03 /* Write, address required */
+
+#define SPI_OPMENU_2 0x03 /* READ: Read Data */
+#define SPI_OPTYPE_2 0x02 /* Read, address required */
+
+#define SPI_OPMENU_3 0x05 /* RDSR: Read Status Register */
+#define SPI_OPTYPE_3 0x00 /* Read, no address */
+
+#define SPI_OPMENU_4 0x20 /* SE20: Sector Erase 0x20 */
+#define SPI_OPTYPE_4 0x03 /* Write, address required */
+
+#define SPI_OPMENU_5 0x9f /* RDID: Read ID */
+#define SPI_OPTYPE_5 0x00 /* Read, no address */
+
+#define SPI_OPMENU_6 0xd8 /* BED8: Block Erase 0xd8 */
+#define SPI_OPTYPE_6 0x03 /* Write, address required */
+
+#define SPI_OPMENU_7 0x0b /* FAST: Fast Read */
+#define SPI_OPTYPE_7 0x02 /* Read, address required */
+
+#define SPI_OPPREFIX ((0x50 << 8) | 0x06) /* EWSR and WREN */
+#define SPI_OPTYPE ((SPI_OPTYPE_7 << 14) | (SPI_OPTYPE_6 << 12) | \
+ (SPI_OPTYPE_5 << 10) | (SPI_OPTYPE_4 << 8) | \
+ (SPI_OPTYPE_3 << 6) | (SPI_OPTYPE_2 << 4) | \
+ (SPI_OPTYPE_1 << 2) | (SPI_OPTYPE_0 << 0))
+#define SPI_OPMENU_UPPER ((SPI_OPMENU_7 << 24) | (SPI_OPMENU_6 << 16) | \
+ (SPI_OPMENU_5 << 8) | (SPI_OPMENU_4 << 0))
+#define SPI_OPMENU_LOWER ((SPI_OPMENU_3 << 24) | (SPI_OPMENU_2 << 16) | \
+ (SPI_OPMENU_1 << 8) | (SPI_OPMENU_0 << 0))
+#define SPI_VSCC (WG_64_BYTE | EO(0x20) | BES_4_KB)
+
+static const struct spi_config spi_config = {
+ .preop = SPI_OPPREFIX,
+ .optype = SPI_OPTYPE,
+ .opmenu = { SPI_OPMENU_LOWER, SPI_OPMENU_UPPER },
+ .lvscc = SPI_VSCC,
+ .uvscc = SPI_VSCC,
+};
+
+int mainboard_get_spi_config(struct spi_config *cfg)
+{
+ memcpy(cfg, &spi_config, sizeof(*cfg));
+
+ return 0;
+}